Once the iCirBus prototype assembled in AQUALIA WWTP in Lobón, the first Validation Round was carried out, according to the scheduled validation protocol described in the Work Plan Report.

<div style="text-align: justify;"> Three cycles of 3 hours each were carried out.</div> <div style="text-align: justify;"> &nbsp;</div> <div style="text-align: justify;"> Heavy Metals Adsorption Capacity throughout each cycle as assessed analyzing HM content hourly in the adsorption tank and contrasting it with the original sewage sludge one.&nbsp;</div> <div style="text-align: justify;"> &nbsp;</div> <div style="text-align: justify;"> Fly ash from the adsorption trial will be characterized in INTROMAC for their later construction material valorization.</div> <div> &nbsp;</div>